Chart A-3 Engine Cranks But Will Not Run

Chart A-3 Engine Cranks But Will Not Run:

CIRCUIT DESCRIPTION
This chart assumes that battery condition and engine cranking speed are OK, adequate fuel in the tank, and glow plug system operating OK.

CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. A Malfunction Indicator Lamp (MIL) "ON" is a basic test to determine if there is a 12 volt supply and ignition 12 volts to PCM. No Data Link Connector (DLC) may be due to a PCM problem and CHART A-2 will diagnose the PCM. Refer to Chart A-2. Related Tests, Information and Procedures
2. This step will check to see if there is an inject command coming from the PCM.
3. This step will check ground circuit.

DIAGNOSTIC AIDS
If no trouble is found in the fuel pump circuit and the cause of a "Engine Cranks But Will Not Run" has not been found, check for:

^ Water or foreign material in the fuel system.
^ Basic engine problem.

NOTE: If crank position sensor and optical sensor are disconnected or inoperable at the same time this will cause a crank but will not run condition. Also check for a plug return.